This page is designed to help you set up your mulipoint injection kit. This is the one area of the conversion that I get the most questions on.
So lets take it from the top!
Connect your laptop to the LPG system. (see lpg connection page)
Go to Vehicle configuration
Chose options that relate to your engine in the drop down boxes.
F1 Change-over Fuel type LPG Sequential (see Installing system to determine)
or Full group this)
Injectors Biagiotti (this is the only injectors
you will be supplied with
a new kit)
F2 Lambda Type of revolution signal Standard (If no revs present try weak signal)
Weak
No. of cylinders 4 cylinders (select No. of cylinders)
Ignition type One coil, (this means one coil per cylinder,
Two coils the thing to remember is it dosent
Rpm sense one matter which one you set it on
Rpm sense two as long as the revs are correct)
F3 Lambda
Type of change-over In acceleration (normally for automatic cars
In deacceleration (normally for manual cars
Revs.thresold for change-over 1600 revs (set the change over revs) r
F3 Sensors Reducer tempreture for change over 30 C ( do not set to low, if the engine is cold it will be
running open loop and will not adjust the fuel trim)
F4 Gas/petrol Change-over from petrol-gas delay 15 s (Many vehicles run a system check when you start
the engine, if it switches to gas during this check it
can upset it. The delay stops this happening)
F5 Modify carb Reset ecu and go to base parameters (This tab allows you to reset the LPG ECU to its
origanal settings should you get in a muddle)
Warning ! You can change yellow parameters only without sub-key (A sub key is a device that unlocks extra parts
of the program, it is not nessaccary for genaral
set ups or one off conversions)
PETROL Revs 800rpm (engine revs ust be correct) Tinj. gas 3.89 (shows the gas injection timing -----------
/ LPG T.gas 32 (shows LPG rail tempreture) this figure is unimportant ! ) -----------
T. reducer 68 (shows reducer tempreture) Tinj. petrol 2.80 (probably the most important reading of all!)------
Shows which
fuel the engine Press gas 1.30 (shows the LPG presure) Lambda 0.7 (connect to the forward lambda probe
is operating on Map 0.32 ( shows manifol absolute Lambda 2 for a easy mixture reading)
presure )
Note; 1 When changing any of the setting on this page you must switch off the ignition, wait for the light to go out on the LPG change over switch and then restart the vehicle.The changes you make will NOT take effect until this is done!
2 You must ensure the correct injectors are selected, (silver or black coils on the LPG rail are fast -biagotti fast - blue coils are slow-biagtti. If the wrong rails are selected it can cause pemanent damage to the LPG ECU.
3 The rpm signal on the screen must match that of the cars rev counter. Try the four settings on 'Igntion type' until the revs are correct, if the rpm still dosent show switch the 'Type of revolution signal' to weak and then try them again. If you still have a problem then you are on the wrong coil wire. Remember to turn off the ignition every time you change the settings!
Once you have completed this run the vehicle on petrol and check that you are getting all the readings. The Lambda may not give a reading yet, this is normal. You will need to go to the 'Lambda' page and complete the settings for the readings to show. The revs should be correct (see note 3 above). You should have a Tinj. petrol timing showing, if you do not check your wiring (see installing system). You will not get 'Tinj. gas' readings until the vehicle is running on LPG. You should have reducer and rail tempretures. The tempreture of the reducer should be the same as the vehicles operating tempreture (if not see installing system)
Now you can go back to the main menu page, (press Esc on your keyboard) Then go to 'AUTO CALIBRATION' this is the easy bit!
On this screen you should see all the readings that are at the bottom of the Vehicle confiuration page. Ensure that the vehicle is up to operating tempreture and that the cooling fan has switched on atleast once. Ensure that the aircon, lights ect are switched off.
The command on the screen is 'Press return (enter) to start calibration'.
It will then tell you to increse the rpm to a set amount - example 'increase revs to 1700-2400'
Hold the revs to a amount between these two figures - example 1900 rpm - The system will switch itself to LPG, it is normal for the rpm to drop at this point. Do not move the throttle, keep it stable. As the system adjusts the revs will return. Calibration will usally take around 3-4 minutes however some vehicles can take longer. If you loose your throttle postion allow the calibration to finish then repeat
Common problems
Impossible to continue no gas presure - Vehicle does not swich to lpg - switch beeping - Lack of gas presure, Tank Empty
Tank solonoid or solonoid filter
valve not operating, check wirring.
Impossible to continue gas tempreture to low - Injector rails are to cold - Check wirring to tempreture sensor on rail - Run engine longer.
Imposible to continue reducer tempreture to low - Check wiring to temp sensor on reducer - Check for air block in water pipe - Run engine longer
Impossible to continue lacking in RPM - This normally happens if the engine stalls - Restart engine and check that rpm matches rev counter
If the vehicle does not auto calibrate, the most lickely cause is wiring faults. Recheck all connection and compare to Instaling system
When you have completed auto calibration and have the vehicle running on LPG exit back to main menu and select the 'DIAGNOSYS' page.
Here you should see four circles (if the engine is 5-6-8cyl there will be 5-6-8 circles) These will be tagged as A B C D ( E F G H )
They should all be green with OK in them, if there is a red X then there is a problem with your petrol injector wires (see below)
Below this you should see 4-5-6-or 8 boxes (depending on amount of cylinders) they will also be tagged as A through to H. You will notice they are in groups of two squares the top square says Off the bottom square, which should be green says On. These are your gas injectors. By clicking in the 'Off' box you can induviduly turn each gas injector back to petrol. With the engine running on LPG do this to each injector gradully turning each one back to petrol and then switch each one back to gas. There should be no noticable differance to the running of the engine regardless of what position the switches are in.
If when you turn one injector back to petrol and the car idles badly or misfires turn off the one next to it if this stops the misfire then you have the injectors crossed. For example if switching A back to petrol causes poor running but switching A & D off does not, then swop the gas injector rail wires A & D. Then check B & C. The reason for this is as follows. The petrol injector cut in loom wires have colours that relate to A B C D or E F G H of the gas injector wires and are as follow Blue Red Green Yellow. Let us say that the blue wire has been paired with B and the red wire with A, when you switch A back to petrol it will switch the blue wire back to petrol and switch gas injector A off. So now cylinder 1 has petrol as well as gas, but cylinder two has no gas or petrol. The same problem can occure if you have an injector pipe crossed over.
During the change over from petrol to gas (or back from gas to petrol) the system switches sequentialy. That is it turns each individual cylinder over to gas. If the wires are not paired correctly you will have a very ruff change over. This is also the case during the Auto calibration and can sometimes stop the calibration from working all together. This becomes even more of a problem if you are dealing with a engine of more than 4 cylinders. For example if you have an 8 cylinder engine there are two banks of wires and gas injectors. As well as insuring that the A B C D matches Blue red green yellow. You must make sure that the Cut in petrol loom with the red bush is going to the second bank of gas injectors (E F G H) If it is not then the vehicle will not calibrate. If the banks are switched then the Tinj. gas timming will keep rising during the calibration as the system trys to work out why it cannot control the injection timmings.
Common problems
I have gone to the diagnostics page but the squares are greyed out and it will not let me switch them - This can sometimes happen, you need to update the ECU firmware, Exit to the main menu page and look in the right hand bottom corner, there you will see the Firmware version. If it is lower than 01900 for 4cylinder engines or 02900 for larger engines then you must click on ECU REPROGRAMMING, A box will appear titled Select program file, there will be a list of available firmwares in this box. For 4 cylinder cars I normally use version 02600. For larger engines, version
02900 or later (0300). Select the file and click open, The screen will display a box with three options. Programming - Change file - Cancel
It is very important that the ignition is switched OFF when the programming takes place or serious damage can be caused to the ECU
Select Programming.The new firmware will now load. Return to DIAGNOSYS and follow the steps above.
Some of the circles have a red X - Wirring fault on the petrol injector cut in loom, most likely you have connected to the live not the negative - Or the is a loose connection.
Check your connections - If the trace wire is the wrong way round ie. going to petrol injector this will not normally show. However the engine will run on both petrol and LPG simaltainisley. Poor running will be evedent. Turninig the injectors on and off should help find the cylinder at fault.
When I turn 4 of my 8 gas injectors back to petrol the engine stalls - Most lickely cause is switched banks, check the red bush loom is paired with E F G H.
Once you are sure that all injectors are correct drive the vehicle on LPG and check that it performs correctly. If under hard load the vehicle switches back to petrol, check the gas presure is not falling much below 1 bar. If it is, increase the gas presure. Important when ever you change the gas presure you must recalibrate the system. All that is left is to check the mixture. Please read Fine Tunning .